Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a2be9516cc8876c…

MALICIOUS

PDF

39.1 KB Created: 2020-08-12 20:04:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2f74b95ca45a865875d4b02733e7a0c SHA-1: 2d621ee64c107ad9caf170edbed3149a9a480656 SHA-256: 9a2be9516cc8876c817441b2a4a9d50fa6df399864d695a8bc6dad3070af0708
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a malicious redirector URL, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the string 'Cupcake recipes pdf' and the malicious URL 'https://ttraff.com/pify?keyword=cupcake+recipes+pdf', suggesting a lure to a malicious site. The presence of numerous Shopify links, some confirmed benign and others unknown, points to a link farm used to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=cupcake+recipes+pdf
    • http://files.coramakes.com/uploads/1/3/1/0/131070434/jonomafofoveluj.pdf
    • http://files.powysdyslexiasupport.co.uk/uploads/1/3/0/8/130874278/9258a.pdf
    • http://nefesa.kualalumpur-properties.com/uploads/1/3/2/7/132710507/nituwegiroruvem_zabowop.pdf
    • https://cdn.shopify.com/s/files/1/0431/4795/2292/files/bexusolawijuwopixawitan.pdf
    • https://cdn.shopify.com/s/files/1/0436/9838/9145/files/kenizolijeniliduke.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/61303888641.pdf
    • https://cdn.shopify.com/s/files/1/0431/9232/0161/files/first_law_of_thermodynamics_in_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0434/2143/4023/files/93615875756.pdf
    • https://cdn.shopify.com/s/files/1/0428/9570/4227/files/25423661791.pdf
    • https://cdn.shopify.com/s/files/1/0430/7451/9194/files/editing_file_on_iphone.pdf
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/19713545115.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9831/files/ligapenazokoxalode.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b06.bin
cf077f218acfb6dd5a9213c30f589de5be3e602e8b41d1076c7f91fa1e448bc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B06 5084 bytes
font_01_sfnt_off00006c60.bin
3d7f21d12841adf3846685782df4e64f1743a3e15d88b52fda1e3154374f0d58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C60 10420 bytes

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